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-rw-r--r--drivers/power/pcf50633-charger.c88
-rw-r--r--drivers/power/pda_power.c89
-rw-r--r--include/linux/mfd/pcf50633/core.h2
-rw-r--r--include/linux/mfd/pcf50633/mbc.h1
-rw-r--r--include/linux/pda_power.h2
5 files changed, 152 insertions, 30 deletions
diff --git a/drivers/power/pcf50633-charger.c b/drivers/power/pcf50633-charger.c
index 41aec2a..e8b278f 100644
--- a/drivers/power/pcf50633-charger.c
+++ b/drivers/power/pcf50633-charger.c
@@ -36,6 +36,8 @@ struct pcf50633_mbc {
struct power_supply usb;
struct power_supply adapter;
+
+ struct delayed_work charging_restart_work;
};
int pcf50633_mbc_usb_curlim_set(struct pcf50633 *pcf, int ma)
@@ -43,6 +45,8 @@ int pcf50633_mbc_usb_curlim_set(struct pcf50633 *pcf, int ma)
struct pcf50633_mbc *mbc = platform_get_drvdata(pcf->mbc_pdev);
int ret = 0;
u8 bits;
+ int charging_start = 1;
+ u8 mbcs2, chgmod;
if (ma >= 1000)
bits = PCF50633_MBCC7_USB_1000mA;
@@ -50,8 +54,10 @@ int pcf50633_mbc_usb_curlim_set(struct pcf50633 *pcf, int ma)
bits = PCF50633_MBCC7_USB_500mA;
else if (ma >= 100)
bits = PCF50633_MBCC7_USB_100mA;
- else
+ else {
bits = PCF50633_MBCC7_USB_SUSPEND;
+ charging_start = 0;
+ }
ret = pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_MBCC7,
PCF50633_MBCC7_USB_MASK, bits);
@@ -60,6 +66,22 @@ int pcf50633_mbc_usb_curlim_set(struct pcf50633 *pcf, int ma)
else
dev_info(pcf->dev, "usb curlim to %d mA\n", ma);
+ /* Manual charging start */
+ mbcs2 = pcf50633_reg_read(pcf, PCF50633_REG_MBCS2);
+ chgmod = (mbcs2 & PCF50633_MBCS2_MBC_MASK);
+
+ /* If chgmod == BATFULL, setting chgena has no effect.
+ * We need to set resume instead.
+ */
+ if (chgmod != PCF50633_MBCS2_MBC_BAT_FULL)
+ pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_MBCC1,
+ PCF50633_MBCC1_CHGENA, PCF50633_MBCC1_CHGENA);
+ else
+ pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_MBCC1,
+ PCF50633_MBCC1_RESUME, PCF50633_MBCC1_RESUME);
+
+ mbc->usb_active = charging_start;
+
power_supply_changed(&mbc->usb);
return ret;
@@ -84,21 +106,6 @@ int pcf50633_mbc_get_status(struct pcf50633 *pcf)
}
EXPORT_SYMBOL_GPL(pcf50633_mbc_get_status);
-void pcf50633_mbc_set_status(struct pcf50633 *pcf, int what, int status)
-{
- struct pcf50633_mbc *mbc = platform_get_drvdata(pcf->mbc_pdev);
-
- if (what & PCF50633_MBC_USB_ONLINE)
- mbc->usb_online = !!status;
- if (what & PCF50633_MBC_USB_ACTIVE)
- mbc->usb_active = !!status;
- if (what & PCF50633_MBC_ADAPTER_ONLINE)
- mbc->adapter_online = !!status;
- if (what & PCF50633_MBC_ADAPTER_ACTIVE)
- mbc->adapter_active = !!status;
-}
-EXPORT_SYMBOL_GPL(pcf50633_mbc_set_status);
-
static ssize_t
show_chgmode(struct device *dev, struct device_attribute *attr, char *buf)
{
@@ -160,10 +167,44 @@ static struct attribute_group mbc_attr_group = {
.attrs = pcf50633_mbc_sysfs_entries,
};
+/* MBC state machine switches into charging mode when the battery voltage
+ * falls below 96% of a battery float voltage. But the voltage drop in Li-ion
+ * batteries is marginal(1~2 %) till about 80% of its capacity - which means,
+ * after a BATFULL, charging won't be restarted until 80%.
+ *
+ * This work_struct function restarts charging at regular intervals to make
+ * sure we don't discharge too much
+ */
+
+static void pcf50633_mbc_charging_restart(struct work_struct *work)
+{
+ struct pcf50633_mbc *mbc;
+ u8 mbcs2, chgmod;
+
+ mbc = container_of(work, struct pcf50633_mbc,
+ charging_restart_work.work);
+
+ mbcs2 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS2);
+ chgmod = (mbcs2 & PCF50633_MBCS2_MBC_MASK);
+
+ if (chgmod != PCF50633_MBCS2_MBC_BAT_FULL)
+ return;
+
+ /* Restart charging */
+ pcf50633_reg_set_bit_mask(mbc->pcf, PCF50633_REG_MBCC1,
+ PCF50633_MBCC1_RESUME, PCF50633_MBCC1_RESUME);
+ mbc->usb_active = 1;
+ power_supply_changed(&mbc->usb);
+
+ dev_info(mbc->pcf->dev, "Charging restarted\n");
+}
+
static void
pcf50633_mbc_irq_handler(int irq, void *data)
{
struct pcf50633_mbc *mbc = data;
+ int chg_restart_interval =
+ mbc->pcf->pdata->charging_restart_interval;
/* USB */
if (irq == PCF50633_IRQ_USBINS) {
@@ -172,6 +213,7 @@ pcf50633_mbc_irq_handler(int irq, void *data)
mbc->usb_online = 0;
mbc->usb_active = 0;
pcf50633_mbc_usb_curlim_set(mbc->pcf, 0);
+ cancel_delayed_work_sync(&mbc->charging_restart_work);
}
/* Adapter */
@@ -186,7 +228,14 @@ pcf50633_mbc_irq_handler(int irq, void *data)
if (irq == PCF50633_IRQ_BATFULL) {
mbc->usb_active = 0;
mbc->adapter_active = 0;
- }
+
+ if (chg_restart_interval > 0)
+ schedule_delayed_work(&mbc->charging_restart_work,
+ chg_restart_interval);
+ } else if (irq == PCF50633_IRQ_USBLIMON)
+ mbc->usb_active = 0;
+ else if (irq == PCF50633_IRQ_USBLIMOFF)
+ mbc->usb_active = 1;
power_supply_changed(&mbc->usb);
power_supply_changed(&mbc->adapter);
@@ -303,6 +352,9 @@ static int __devinit pcf50633_mbc_probe(struct platform_device *pdev)
return ret;
}
+ INIT_DELAYED_WORK(&mbc->charging_restart_work,
+ pcf50633_mbc_charging_restart);
+
ret = sysfs_create_group(&pdev->dev.kobj, &mbc_attr_group);
if (ret)
dev_err(mbc->pcf->dev, "failed to create sysfs entries\n");
@@ -328,6 +380,8 @@ static int __devexit pcf50633_mbc_remove(struct platform_device *pdev)
power_supply_unregister(&mbc->usb);
power_supply_unregister(&mbc->adapter);
+ cancel_delayed_work_sync(&mbc->charging_restart_work);
+
kfree(mbc);
return 0;
diff --git a/drivers/power/pda_power.c b/drivers/power/pda_power.c
index b56a704..a232de6 100644
--- a/drivers/power/pda_power.c
+++ b/drivers/power/pda_power.c
@@ -12,11 +12,14 @@
#include <linux/module.h>
#include <linux/platform_device.h>
+#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/power_supply.h>
#include <linux/pda_power.h>
+#include <linux/regulator/consumer.h>
#include <linux/timer.h>
#include <linux/jiffies.h>
+#include <linux/usb/otg.h>
static inline unsigned int get_irq_flags(struct resource *res)
{
@@ -35,6 +38,11 @@ static struct timer_list supply_timer;
static struct timer_list polling_timer;
static int polling;
+#ifdef CONFIG_USB_OTG_UTILS
+static struct otg_transceiver *transceiver;
+#endif
+static struct regulator *ac_draw;
+
enum {
PDA_PSY_OFFLINE = 0,
PDA_PSY_ONLINE = 1,
@@ -104,18 +112,35 @@ static void update_status(void)
static void update_charger(void)
{
- if (!pdata->set_charge)
- return;
-
- if (new_ac_status > 0) {
- dev_dbg(dev, "charger on (AC)\n");
- pdata->set_charge(PDA_POWER_CHARGE_AC);
- } else if (new_usb_status > 0) {
- dev_dbg(dev, "charger on (USB)\n");
- pdata->set_charge(PDA_POWER_CHARGE_USB);
- } else {
- dev_dbg(dev, "charger off\n");
- pdata->set_charge(0);
+ static int regulator_enabled;
+ int max_uA = pdata->ac_max_uA;
+
+ if (pdata->set_charge) {
+ if (new_ac_status > 0) {
+ dev_dbg(dev, "charger on (AC)\n");
+ pdata->set_charge(PDA_POWER_CHARGE_AC);
+ } else if (new_usb_status > 0) {
+ dev_dbg(dev, "charger on (USB)\n");
+ pdata->set_charge(PDA_POWER_CHARGE_USB);
+ } else {
+ dev_dbg(dev, "charger off\n");
+ pdata->set_charge(0);
+ }
+ } else if (ac_draw) {
+ if (new_ac_status > 0) {
+ regulator_set_current_limit(ac_draw, max_uA, max_uA);
+ if (!regulator_enabled) {
+ dev_dbg(dev, "charger on (AC)\n");
+ regulator_enable(ac_draw);
+ regulator_enabled = 1;
+ }
+ } else {
+ if (regulator_enabled) {
+ dev_dbg(dev, "charger off\n");
+ regulator_disable(ac_draw);
+ regulator_enabled = 0;
+ }
+ }
}
}
@@ -194,6 +219,13 @@ static void polling_timer_func(unsigned long unused)
jiffies + msecs_to_jiffies(pdata->polling_interval));
}
+#ifdef CONFIG_USB_OTG_UTILS
+static int otg_is_usb_online(void)
+{
+ return (transceiver->state == OTG_STATE_B_PERIPHERAL);
+}
+#endif
+
static int pda_power_probe(struct platform_device *pdev)
{
int ret = 0;
@@ -227,6 +259,9 @@ static int pda_power_probe(struct platform_device *pdev)
if (!pdata->polling_interval)
pdata->polling_interval = 2000;
+ if (!pdata->ac_max_uA)
+ pdata->ac_max_uA = 500000;
+
setup_timer(&charger_timer, charger_timer_func, 0);
setup_timer(&supply_timer, supply_timer_func, 0);
@@ -240,6 +275,13 @@ static int pda_power_probe(struct platform_device *pdev)
pda_psy_usb.num_supplicants = pdata->num_supplicants;
}
+ ac_draw = regulator_get(dev, "ac_draw");
+ if (IS_ERR(ac_draw)) {
+ dev_dbg(dev, "couldn't get ac_draw regulator\n");
+ ac_draw = NULL;
+ ret = PTR_ERR(ac_draw);
+ }
+
if (pdata->is_ac_online) {
ret = power_supply_register(&pdev->dev, &pda_psy_ac);
if (ret) {
@@ -261,6 +303,13 @@ static int pda_power_probe(struct platform_device *pdev)
}
}
+#ifdef CONFIG_USB_OTG_UTILS
+ transceiver = otg_get_transceiver();
+ if (transceiver && !pdata->is_usb_online) {
+ pdata->is_usb_online = otg_is_usb_online;
+ }
+#endif
+
if (pdata->is_usb_online) {
ret = power_supply_register(&pdev->dev, &pda_psy_usb);
if (ret) {
@@ -300,10 +349,18 @@ usb_irq_failed:
usb_supply_failed:
if (pdata->is_ac_online && ac_irq)
free_irq(ac_irq->start, &pda_psy_ac);
+#ifdef CONFIG_USB_OTG_UTILS
+ if (transceiver)
+ otg_put_transceiver(transceiver);
+#endif
ac_irq_failed:
if (pdata->is_ac_online)
power_supply_unregister(&pda_psy_ac);
ac_supply_failed:
+ if (ac_draw) {
+ regulator_put(ac_draw);
+ ac_draw = NULL;
+ }
if (pdata->exit)
pdata->exit(dev);
init_failed:
@@ -327,6 +384,14 @@ static int pda_power_remove(struct platform_device *pdev)
power_supply_unregister(&pda_psy_usb);
if (pdata->is_ac_online)
power_supply_unregister(&pda_psy_ac);
+#ifdef CONFIG_USB_OTG_UTILS
+ if (transceiver)
+ otg_put_transceiver(transceiver);
+#endif
+ if (ac_draw) {
+ regulator_put(ac_draw);
+ ac_draw = NULL;
+ }
if (pdata->exit)
pdata->exit(dev);
diff --git a/include/linux/mfd/pcf50633/core.h b/include/linux/mfd/pcf50633/core.h
index 4455b21..c8f51c3 100644
--- a/include/linux/mfd/pcf50633/core.h
+++ b/include/linux/mfd/pcf50633/core.h
@@ -29,6 +29,8 @@ struct pcf50633_platform_data {
char **batteries;
int num_batteries;
+ int charging_restart_interval;
+
/* Callbacks */
void (*probe_done)(struct pcf50633 *);
void (*mbc_event_callback)(struct pcf50633 *, int);
diff --git a/include/linux/mfd/pcf50633/mbc.h b/include/linux/mfd/pcf50633/mbc.h
index 6e17619..4119579 100644
--- a/include/linux/mfd/pcf50633/mbc.h
+++ b/include/linux/mfd/pcf50633/mbc.h
@@ -128,7 +128,6 @@ enum pcf50633_reg_mbcs3 {
int pcf50633_mbc_usb_curlim_set(struct pcf50633 *pcf, int ma);
int pcf50633_mbc_get_status(struct pcf50633 *);
-void pcf50633_mbc_set_status(struct pcf50633 *, int what, int status);
#endif
diff --git a/include/linux/pda_power.h b/include/linux/pda_power.h
index cb7d10f..d4cf7a2 100644
--- a/include/linux/pda_power.h
+++ b/include/linux/pda_power.h
@@ -31,6 +31,8 @@ struct pda_power_pdata {
unsigned int wait_for_status; /* msecs, default is 500 */
unsigned int wait_for_charger; /* msecs, default is 500 */
unsigned int polling_interval; /* msecs, default is 2000 */
+
+ unsigned long ac_max_uA; /* current to draw when on AC */
};
#endif /* __PDA_POWER_H__ */
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